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46 results about "Superconducting quantum computing" patented technology
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Superconducting quantum computing is an implementation of a quantum computer in superconducting electronic circuits. Research in superconducting quantum computing is conducted by Google, IBM, BBN Technologies, Rigetti, and Intel. as of May 2016, up to nine fully controllable qubits are demonstrated in a 1D array, up to sixteen in a 2D architecture.
Encoding and error suppression for superconducting quantum computers
The present invention involves a quantum computing structure, comprising: one or more logical qubits, which is encoded into a plurality of superconducting qubits; and each of the logical qubits comprises at least one operating qubit and at least one ancilla qubit. Also provided is a method of quantum computing, comprising: performing encoded quantum computing operations with logical qubits that are encoded into superconducting operating qubits and superconducting ancilla qubits. The present invention further involves a method of error correction for a quantum computing structure comprising: presenting a plurality of logical qubits, each of which comprises an operating physical qubit and an ancilla physical qubit, wherein the logical states of the plurality of logical qubits are formed from a tensor product of the states of the operating and ancilla qubits; and wherein the states of the ancilla physical qubits are suppressed; and applying strong pulses to the grouping of logical qubits.
Owner:D WAVE SYSTEMS INC +1
Multi-bit control system and method based on superconducting quantum computing
The invention provides a multi-bit control system and method based on superconducting quantum computing. The method comprises the following steps: outputing an initial quantum state and an initial microwave sequence as cross-frequency signals; controlling a built-in multi-bit gate according to the received cross-frequency signals, and outputting a quantum state to be measured; measuring the quantum state to be measured to obtain an inherent fidelity of the current multi-bit gate; and performing computing according to the inherent fidelity to generate an optimized microwave sequence, and performing feedback and optimization on the optimized microwave sequence to obtain a target multi-bit gate.
Owner:TSINGHUA UNIV
Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
ActiveCN110738320AQuick controlManipulation does not affectQuantum computersHemt circuitsParticle physics
The invention discloses a superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computing. The superconducting circuit structure comprises the components of: at least two quantum bits; a connecting assembly which is respectively coupled with the two quantum bits and is used for realizing transverse field coupling between the connecting assembly and the two quantum bits; and a coupling device which is respectively coupled with the two quantum bits and is used for realizing longitudinal field coupling betweenthe coupling device and the two quantum bits. Therefore, sigma z sigma z parasitic coupling between the quantum bits is efficiently eliminated, and two quantum bit gates with high fidelity are realized.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
High-fidelity superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
ActiveCN111931940ASolve the problem of ZZ parasitic couplingImprove fidelityQuantum computersHemt circuitsParticle physics
The invention discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computing. According to the specific implementation scheme, quantum bits are calculated; the coupling device is used for being coupled with the two calculation quantum bits; the connection assembly is arranged betweenthe calculation quantum bit and the coupling device and is used for carrying out coupling connection on the calculation quantum bit and the coupling device so as to realize a target quantum gate basedon the coupling device and the calculation quantum bit; in this way, parasitic coupling between the calculation quantum bits is eliminated by selecting reasonable superconducting circuit parameters,and the fidelity of the target quantum gate is improved.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
The embodiment of the invention provides a superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and the superconducting circuit structure comprisesat least two basic units and a coupling structure, wherein the basic unit at least comprises a quantum bit and a resonant cavity coupled with the longitudinal field of the quantum bit, the resonant cavity comprises a first inductor and a first capacitor connected with the first inductor in parallel, and the resonant cavity and the quantum bit are subjected to longitudinal field coupling by utilizing the first inductor; and the coupling structure is used for coupling the resonant cavities in the two basic units so as to realize linear coupling between the two basic units. Thus, the problem ofcrosstalk among the quantum bits is solved, and the purposes of simple structure, easiness in regulation and control and expandability of the superconducting circuit are achieved on the basis of no crosstalk among the quantum bits.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
An extensible superconducting quantum bit structure
ActiveCN109840596AScalable Superconducting Qubit StructuresImprove fidelityQuantum computersCapacitanceInductor
The invention discloses an extensible superconducting quantum bit structure which comprises a plurality of superconducting quantum bit lines, each superconducting quantum bit line comprises at least one Josephson junction structure, and each Josephson junction structure is a Josephson junction, or a plurality of Josephson junctions, or a combination of the Josephson junction and an auxiliary line;a capacitor and an inductor which are directly connected with the Josephson junction; a coupler circuit which is used for adjusting the coupling strength between the superconducting quantum bits connected with the coupler, and the coupling strength can be adjusted to be close to or equal to zero; an overline which is used for connecting the superconducting quantum bit line and the ground on the two sides of the coupler line; Wherein the number of the capacitors directly connected with the Josephson junction is multiple, and the superconducting quantum bits are coupled with other circuits through a branch structure formed by the plurality of capacitors. The structure has the advantages of high precision, high expansibility and low crosstalk, and the application of superconducting quantum calculation is promoted.
Owner:UNIV OF SCI & TECH OF CHINA
Superconducting quantum bit structure with adjustable adjacent bit coupling strength
ActiveCN109784493AAdjust the coupling strengthImprove fidelityQuantum computersInductorUltimate tensile strength
Owner:UNIV OF SCI & TECH OF CHINA
Superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
PendingCN111091195AAvoid crosstalkAchieve couplingQuantum computersPulse generation by super conductive devicesHemt circuitsParticle physics
The invention discloses a superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum calculation. According to the specific implementation scheme, the superconducting circuit structure comprises at least three calculation quantum bits; the bus qubit is connected with the calculation qubits, and equivalent coupling is generated between any two calculation qubits connected through the bus qubit; the coupling quantum bit is arranged between the calculation quantum bit and the bus quantum bit, connects the calculation quantum bit with the bus quantum bit and is used for regulating and controlling the coupling strength between the calculation quantum bit and the bus quantum bit; coupling between any two calculation quantum bits can be achieved, then quantum gate operation between any two calculation quantum bits is achieved, and meanwhile crosstalk between the calculation quantum bits can be effectively restrained.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
High-fidelity superconducting circuit structure, superconducting quantum chip and superconducting quantum computer
ActiveCN111931941ASolve the problem of ZZ parasitic couplingImprove fidelityQuantum computersHemt circuitsParticle physics
The invention discloses a high-fidelity superconducting circuit structure, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computing. According to the specific implementation scheme, quantum bits are calculated; the coupling device is used for being coupled with the two calculation quantum bits; the connection assembly is arranged betweenthe calculation quantum bit and the coupling device and is used for carrying out coupling connection on the calculation quantum bit and the coupling device so as to realize a target quantum gate basedon the coupling device and the calculation quantum bit; wherein the calculation quantum bit and the detuning intensity of the coupling device are positive values. In this way, parasitic coupling between the calculation quantum bits is eliminated by selecting reasonable superconducting circuit parameters, and the fidelity of the target quantum gate is improved.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Superconducting circuit architecture comprising plurality of coupling devices and superconducting quantum chip
ActiveCN111523672AEliminate parasitic couplingImprove fidelityQuantum computersSoftware engineeringHemt circuits
The invention discloses a superconducting circuit architecture comprising a plurality of coupling devices, a superconducting quantum chip and a superconducting quantum computer, and relates to the technical field of quantum computing. The circuit comprises a first quantum bit, a second quantum bit, a first coupling device and a second coupling device, the first coupling device is coupled with thefirst quantum bit and the second quantum bit through a first connecting piece; the second coupling device is coupled with the first quantum bit and the second quantum bit through a second connecting piece; and the frequencies of the first quantum bit and the second quantum bit are between the frequency of the first coupling device and the frequency of the second coupling device, and the nonlinearstrength of the first coupling device is opposite to the nonlinear strength of the second coupling device in sign. According to the technical scheme of the invention, parasitic coupling between quantum bits in the superconducting circuit can be eliminated, and the fidelity of a single-bit quantum gate and a two-bit quantum gate realized in the superconducting circuit is improved.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Quantum instruction compiler for optimizing hybrid algorithms
ActiveUS11494681B1Effective instructionQuantum computersKernel methodsQuantum algorithmParallel computing
A compiler for a gate-based superconducting quantum computer compiles hybrid classical / quantum algorithms for quantum processing cells with different configurations. The compiler inputs the algorithm and outputs code in a target language executable by a quantum processing cell of a quantum processing system that can execute the algorithm. The compiler includes various functionality, such as: parsing, analyzing control flows, addressing, compressing, and translating. The compiler optimizes algorithms in various manners using the functionality. Some optimizations include addressing efficiently, compressing based on simulations, and translating for efficient execution of parametric functions. The compiler may function in the environment of a cloud quantum computing system. The cloud quantum computing system may receive algorithms from remote access nodes for execution on local classical and quantum computing systems.
Owner:RIGETTI & CO
Optimization method and device for calculating single-bit gate sequence by superconducting quantum, and medium
ActiveCN111275196AReduce in quantityShorten the time spanQuantum computersEnergy efficient computingMicrowaveParticle physics
The invention discloses an optimization method and device for calculating single-bit gate sequence by superconducting quantum, and a medium, and is used for solving the problems that the time span ofan input microwave pulse sequence is too long, quantum bit degradation is caused, and the uncertainty of a superconducting quantum calculation result is caused. The method comprises the following steps: determining a rotation operation corresponding to a single-bit gate sequence according to a preset rule; according to each rotation operation corresponding to the single-bit gate sequence, correspondingly rotating the initial state of the quantum bit to obtain a final state of the quantum bit; determining an equivalent rotation axis and an equivalent rotation angle corresponding to the single-bit gate sequence according to the quantum bit initial state and the quantum bit final state; and determining an optimized pulse sequence corresponding to the single-bit gate sequence according to theequivalent rotation axis and the equivalent rotation angle. According to the method, the time span of microwave pulse input corresponding to the single-bit gate sequence can be shortened, so that thesame quantum bit final state can be obtained on the premise that the decoherence degree of quantum bits is minimum, and the calculation accuracy is improved.
Owner:SHANDONG INSPUR SCI RES INST CO LTD
Extensible superconducting quantum bit structure
ActiveCN109784492AScalable Superconducting Qubit StructuresImprove fidelityQuantum computersCapacitanceInductor
The invention discloses an extensible superconducting quantum bit structure which comprises a plurality of superconducting quantum bit lines, each superconducting quantum bit line comprises at least one Josephson junction structure, and each Josephson junction structure is a Josephson junction, or a plurality of Josephson junctions, or a combination of the Josephson junction and an auxiliary line;wherein the capacitor and the inductor are directly connected with the Josephson junction; a coupler circuit used for adjusting the coupling strength between the superconducting quantum bits connected with the coupler, and the coupling strength can be adjusted to be close to or equal to zero. The number of the capacitors directly connected with the Josephson junction is multiple, and the superconducting quantum bits are coupled with other circuits through a branch structure formed by the plurality of capacitors. The structure further improves the expansibility of the superconducting quantum bit structure on the basis of improving the precision of quantum calculation, and promotes the application of superconducting quantum calculation.
Owner:UNIV OF SCI & TECH OF CHINA
Easy-to-expand and high-fidelity superconducting quantum chip structure and operation method
ActiveCN112331693ASmall parasitic couplingEliminate parasitic couplingQuantum computersSolid-state devicesMicrowaveSoftware engineering
The invention relates to an easy-to-expand and high-fidelity superconducting quantum chip structure and an operation method. The superconducting quantum chip structure is characterized by comprising aplurality of adjustable couplers and a plurality of quantum bits; wherein the quantum bits and the adjustable couplers are arranged alternately, and the static frequency of the adjustable couplers, the adjacent quantum bits and the frequencies of the quantum bits adjacent to the same adjustable coupler are located in different frequency bands; each quantum bit is provided with an independent microwave driving line XY, wherein each adjustable coupler is provided with an independent magnetic flux bias line Z, and a single-bit gate, a two-bit gate or a multi-bit controlled phase gate is realizedby applying a driving signal to the microwave driving line XY or the magnetic flux bias line Z. The method can be widely applied to the field of superconducting quantum computing.
Owner:深圳市福田区南科大量子技术与工程研究院 +1
Large-area aluminum single crystal film and preparation method and application thereof
ActiveCN113106542AAchieve twinningNo twinningQuantum computersPolycrystalline material growthPiranha solutionSingle crystal
The invention discloses a large-area aluminum single crystal film and a preparation method and application thereof. The preparation method comprises the following steps: sequentially carrying out organic cleaning, RCA1 cleaning, RCA2 cleaning, piranha solution cleaning and HF cleaning on a Si (111) substrate to obtain a pretreated Si (111) substrate; and under a vacuum condition, placing the pretreated Si (111) substrate in a molecular beam epitaxy device for surface treatment, and growing an aluminum single crystal film on the surface of the Si (111) substrate by adopting a molecular beam epitaxy technology to obtain the large-area aluminum single crystal film. Compared with a Si substrate traditional technology, the Si (111) / Al single crystal film prepared through the method has the advantages that a large-area Al single crystal film is achieved, twin crystals do not exist, the content of C, H and O impurities on a Si / Al interface can be obviously reduced, the intrinsic quality factor of a resonator is improved to 106, and preparation of high-quality superconducting quantum bits or superconducting quantum computers is facilitated.
Owner:SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
Superconducting quantum computing chip layout generation method and device
PendingCN114239838ALess typingReduce build complexityQuantum computersComputer architectureGeometric modeling
The invention provides a superconductive quantum computing chip layout generation method and device, and belongs to the technical field of quantum computing. According to the method, device attributes of a plurality of preset quantum chip devices are determined through a first signal generated based on user operation; wherein the preset quantum chip device is generated by developing a two-dimensional and three-dimensional geometric modeling application program opencast, and the device attributes at least comprise a device name, a device function and a device position. And determining the layout of the chip to be determined according to the attributes of the devices. Wherein the to-be-determined chip layout is obtained by adding each preset quantum chip device to a device layout layer, and the device layout layer is a pre-created device layout layer of the superconducting quantum computing chip. And generating a superconducting quantum computing chip layout based on each preset quantum chip device in the to-be-determined chip layout.
Owner:SHANDONG INSPUR SCI RES INST CO LTD
Long-service-life storage device and long-service-life storage method for superconducting quantum bits
The invention discloses a long-life storage device and a long-service-life storage method for superconducting quantum bits. The three-dimensional ellipsoid radio frequency superconducting thin film cavity with high quality factor is adopted, and compared with a currently used rectangular cavity, the three-dimensional ellipsoid radio frequency superconducting thin film cavity has the advantages that the quality factor reaches up to 1010; the superconductive quantum bits are coupled with the superconductive cavity, and the decorrelation time of the superconductive quantum bits is prolonged to a hundred milliseconds to second order, so that obstacles are cleared for realizing control and measurement of the quantum bits and quantum storage; according to the method, the superconducting quantum bits with long service life can be obtained, and the device method have important significance for quantum calculation, quantum storage, quantum information, quantum communication and other aspects; the three-dimensional ellipsoid radio frequency superconducting thin film cavity is applied to superconducting quantum calculation for the first time, a mature superconducting cavity technology and emerging superconducting quantum calculation are combined, and the superconducting quantum calculation is further extrapolated forwards.
Owner:PEKING UNIV
Superconducting traveling-wave parametric amplifier
ActiveUS20200350880A1Reduce input powerEasy to controlQuantum computersSuperconductor detailsLow noiseSoftware engineering
A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.
Owner:SEEQC INC
Quantum circuit and control method thereof, superconducting quantum chip and superconducting quantum computer
PendingCN114595821AImplement initializationRealize energy exchangeQuantum computersResonant cavityQuantum circuit
The invention provides a quantum circuit and a control method thereof, a superconducting quantum chip and a superconducting quantum computer, and relates to the field of quantum computers, in particular to the technical field of superconducting quantum chips. The quantum circuit comprises a quantum bit and a reading resonant cavity, and the adjustable coupler is configured to be coupled with the quantum bit and the reading resonant cavity. When the quantum bit is initialized based on the reading resonant cavity, the modulation frequency of the adjustable coupler is configured to be equal to the difference between the frequency of the reading resonant cavity and the frequency of the quantum bit.
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Demonstration method and device for superconducting quantum computer simulation system
ActiveCN111638829ADeepen understandingRealize interactive experienceQuantum computersInput/output processes for data processingDevice simulationEngineering
The invention belongs to the technical field of quantum computing, and particularly discloses a demonstration method and device for a superconducting quantum computer simulation system. The method comprises the steps: displaying the superconducting quantum computer simulation system on a first demonstration interface, wherein the superconducting quantum computer simulation system comprises the following subsystems: a quantum cloud platform simulation system, a quantum measurement and control device simulation system, a low-temperature control device simulation system, a low-temperature providing device simulation system and an auxiliary equipment simulation system; receiving a trigger operation of a user for any subsystem; and in response to the trigger operation, switching to display a corresponding demonstration interface of a subsystem corresponding to the trigger operation. The working principle and method of the superconducting quantum computer can be conveniently understood by the public, understanding of the public on the superconducting quantum computer is deepened, and related technical gaps are filled.
Owner:ORIGIN QUANTUM COMPUTING TECH (HEFEI) CO LTD
Superconducting quantum calculation system and quantum bit control method
The invention provides a superconducting quantum calculation system and a quantum bit manipulation method. The system comprises a control circuit and a superconducting quantum chip, the superconducting quantum chip comprises at least two communication regions and a first central exchange region, and each communication region comprises a first suspension superconducting bit and at least one first superconducting bit; the first central exchange area comprises first suspended superconducting bits and is used for transmitting quantum operation among the superconducting bits in different communication areas; and the control circuit is used for controlling the coupling strength of the first suspension superconducting bit and the first superconducting bit. Therefore, by controlling the coupling strength between the first suspension superconducting bits and the first superconducting bits, a single communication region or a central exchange region can be isolated, so that sub-spaces are effectively segmented, and two-bit gate control between different communication regions can be transited through the central exchange region; therefore, various quantum control required by general quantum calculation can be realized on a large-scale superconducting quantum calculation chip.
Owner:HUAWEI TECH CO LTD
A long-life storage device and storage method for superconducting qubits
The invention discloses a superconducting qubit long-life storage device and a storage method thereof. The present invention adopts a three-dimensional ellipsoid radio frequency superconducting film cavity with a high quality factor, which has great advantages compared with the currently used rectangular cavity: the quality factor is as high as 10 10 ; and the superconducting qubit is coupled with the superconducting cavity, and the decoherence time of the superconducting qubit is increased to the order of hundreds of milliseconds to seconds, thereby clearing the way for the realization of the manipulation, measurement and quantum storage of the qubit; The invention will be beneficial to obtain long-life superconducting qubits, which are of great significance to quantum computing, quantum storage, quantum information and quantum communication; the invention is the first to apply a three-dimensional ellipsoidal radio frequency superconducting thin film cavity to superconducting quantum In computing, the mature superconducting cavity technology is combined with the emerging superconducting quantum computing to push superconducting quantum computing a step forward.
Owner:PEKING UNIV
Architecture of superconducting quantum computer and information processing method
PendingCN112613616AShorten the transmission distanceReduce transfer timeQuantum computersInformation processingThermodynamics
The invention discloses a system architecture of a superconducting quantum computer and an information processing method. The system architecture comprises temperature-controllable low-temperature equipment, a superconducting quantum processor, a low-temperature electronic function unit, a room-temperature terminal and a low-temperature room-temperature communication link. The superconducting quantum processor is arranged in the low-temperature equipment and works in a first temperature interval of mK magnitude. The low-temperature electronic function unit is arranged in the low-temperature equipment and works in a second temperature interval, the minimum value of the second temperature interval is higher than the maximum value of the first temperature interval, or the maximum value of the second temperature interval is higher than the maximum value of the first temperature interval, and the second temperature interval is overlapped with the first temperature interval; and the low-temperature electronic function unit is used for providing a required signal for the work of the superconducting quantum processor. the room-temperature terminal is in a third temperature interval, and the maximum value of the second temperature interval is smaller than the minimum value of the third temperature interval; and the room-temperature terminal communicates with the low-temperature electronic function unit through the low-temperature and room-temperature communication link.
Owner:UNIV OF SCI & TECH OF CHINA
An integrated packaging structure and method for superconducting quantum computing chips
ActiveCN107564868BImprove decoherence timeReduce crosstalkSemiconductor/solid-state device detailsSolid-state devicesResonant cavityElectromagnetic shielding
The invention discloses a superconducting quantum computing chip integrated package structure and method. The integrated package structure comprises a superconducting quantum computing chip, and a flip chip packaged together with the superconducting quantum computing chip. An insulation substrate of the superconducting quantum computing chip has a plurality of mutually-coupled superconducting quantum bits and first communication lines connected with the superconducting quantum bits and used for carrying out control and readout on the superconducting quantum bits. The flip chip has a pluralityof superconductive resonant cavities. The superconductive resonant cavities are corresponding to the superconducting quantum bits and the first communication lines, and are used for carrying out magnetic shielding on each superconducting quantum bit and each first communication line. Magnetic shielding can be carried out on each superconducting quantum bit and each first communication line, so that crosstalk between input and output leads and influence on quantum bits are reduced, de-coherence time of the quantum bits is improved, and requirement for large-scale quantum computation is reached.
Owner:TSINGHUA UNIV
Initialization parameter determination method and device of quantum measurement and control system and medium
PendingCN111752630AGuaranteed uptimeDigital variable displayCharacter and pattern recognitionResonant cavityControl system
The embodiment of the invention discloses an initialization parameter determination method and device for a quantum measurement and control system, and a medium. The method comprises the steps: measuring the frequency of a first resonant cavity corresponding to a quantum bit in a quantum chip and first measurement data through the quantum measurement and control system; respectively converting thefrequency of the first resonant cavity and the first measurement data into a first vector and a second vector through a vector conversion module; and inputting the first vector and the second vectorinto a pre-trained initialization parameter setting model, and determining initialization parameters of the quantum measurement and control system. According to the embodiment of the invention, the initialization parameters of the quantum measurement and control system are determined through the initialization parameter determination system, so that the superconducting quantum computer can operatenormally.
Owner:JINAN INSPUR HIGH TECH TECH DEV CO LTD
Superconducting traveling-wave parametric amplifier
ActiveUS10998869B2Easy to controlImprove performanceQuantum computersSuperconductor detailsLow noiseSoftware engineering
A system and method are disclosed for a superconducting traveling-wave parametric amplifier (TWPA) with improved control and performance. In a preferred embodiment, the amplifier comprises an integrated array of symmetric rf-SQUIDs in a transmission line structure. A device was fabricated using niobium superconducting integrated circuits, and confirmed predicted performance, with a maximum gain up to 17 dB and a bandwidth of 4 GHz. A similar device can be applied as a low-noise, low-dissipation microwave amplifier for output from a superconducting quantum computer, or as a preamplifier, switch, or frequency converter for a sensitive microwave receiver, or as an output amplifier for a frequency-multiplexed superconducting detector array.
Owner:SEEQC INC
On-chip non-reflective quantum amplifier with nonreciprocity
PendingCN113206645AAvoid interferencePromoting Scale DevelopmentParametric amplifiersAmplifier modifications to extend bandwidthQuantum amplifierHemt circuits
The invention discloses an on-chip non-reflective quantum amplifier with nonreciprocity. The on-chip quantum amplifier provided by the embodiment of the invention is a two-port on-chip device with an isolation function and an amplification function, is small in size and low in dissipation, and has nonreciprocity. According to the on-chip quantum amplifier provided by the embodiment of the invention, the input signal and the output signal are isolated, and the interference of signal reflection on the quantum chip is prevented. The on-chip quantum amplifier provided by the embodiment of the invention can be integrated with a superconducting circuit, plays an important role in high-fidelity measurement of quantum bits of a large-scale superconducting quantum computer, and is very beneficial to large-scale development of the superconducting quantum computer.
Owner:TSINGHUA UNIV
A superconducting circuit structure, a superconducting quantum chip, and a superconducting quantum computer
Owner:BEIJING BAIDU NETCOM SCI & TECH CO LTD
Niobium-based planar multi-superconducting quantum bit and preparation method and application thereof
PendingCN112582529ASolve the problems existing in the process of preparing superconducting qubitsQuantum computersNanoinformaticsNiobiumHemt circuits
The invention provides a niobium-based planar multi-superconducting quantum bit which comprises a substrate and a metal niobium film arranged on the substrate. A superconducting circuit is etched on the surface of the metal niobium film, and one or more Josephson junctions are prepared. The invention also provides a preparation method and application thereof. According to the present invention, the planar multi-superconducting quantum bit with the niobium substrate as the substrate is successfully obtained, and the problems existing in the technology for preparing the superconducting quantum bit through the aluminum substrate are solved. Tests of Institute of Physics of Chinese Academy of Sciences show that the performance of the multi-quantum bit obtained by the process reaches the corresponding level in the world. The niobium-based planar multi-superconducting quantum bit can be further applied to the calculation and simulation of superconducting quantum calculation on scientific problems and a three-dimensional processing technology of superconducting quantum bits.
Owner:INST OF PHYSICS - CHINESE ACAD OF SCI
On-chip non-reflective quantum amplifier with strong isolation function
PendingCN113206649AStrong volumeReduce volumeQuantum computersSuperconductive amplifiersQuantum amplifierHemt circuits
The invention discloses an on-chip non-reflective quantum amplifier with a strong isolation function. The on-chip quantum amplifier provided by the embodiment of the invention is a two-port on-chip device with a strong isolation function, a circulation function and an amplification function, is small in size and low in dissipation, and has nonreciprocity. According to the on-chip quantum amplifier with the strong isolation function, the gain bandwidth product of the amplifier is increased, the strong isolation function is achieved, meanwhile, an HEMT can be replaced, and the cost of a superconducting quantum computer and the cost of a test system of the superconducting quantum computer are greatly reduced. The on-chip quantum amplifier with the strong isolation function, provided by the embodiment of the invention, can be directly connected with the quantum chip, so that the quantum chip is protected from counteractive interference of a subsequent circuit. Based on the on-chip quantum amplifier provided by the embodiment of the invention, the superconducting quantum test system is simplified, the size of the superconducting quantum test system is remarkably reduced, and large-scale development of superconducting quantum computers is facilitated.
Owner:TSINGHUA UNIV
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